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Re: [TR] 1965 TR4A - Looking to drill out a stud hole in block. Need rec

To: triumphs@autox.team.net
Subject: Re: [TR] 1965 TR4A - Looking to drill out a stud hole in block. Need recommendations on a drill guide/jig.
From: David P <frogeye@porterscustom.com> (ame8.swcp.com [216.184.2.128]); Mon, 13 Dec 2021 07:42:07 -0700 (MST) NO_RELAYS,SPF_PASS version=3.4.1
Date: Mon, 13 Dec 2021 07:42:06 -0700
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... my recollection is waning, but did not the TR7 block have purposely 
canted head studs that had to be removed/inserted individually? Anyone?  dp

On 12/13/2021 7:08 AM, Randy and Valerie DeRuiter wrote:
> Guy-
>
> I don't want to sound too doom and gloomy, but have you ruled out a 
> cracked block at that location?  That is a common spot for one, 
> usually from someone in the past who pulled the engine by the studs. 
> At least I had an engine like that.  If you haven't done so, take a 
> very good look at the inside edge of the threaded hole.  If you see a 
> crack, that helicoil trick likely won't work.
>
> If you are convinced it is not cracked, possibly another solution 
> would be to take advantage of the deeper hole that you've measured and 
> get a shop to extend the threads of a longer head bolt.  One of the 
> inside longer ones might work - then shorten the other end to fit.  
> The puzzling part is why does the stud cant to the rear - that doesn't 
> sound good.
>
> Randy
>
> ------------------------------------------------------------------------
> *From:* Triumphs <triumphs-bounces@autox.team.net> on behalf of Guy 
> Huggins <guy.huggins@icloud.com>
> *Sent:* Saturday, December 11, 2021 5:28 PM
> *To:* Triumph Mailing List <triumphs@autox.team.net>
> *Subject:* [TR] 1965 TR4A - Looking to drill out a stud hole in block. 
> Need recommendations on a drill guide/jig.
> Howdy All,
>
> As part the head gasket replacement project, I need to address a 
> wallowed-out and stripped cylinder head stud hole in the block.
> (If you were standing on the manifold side of the engine, it would be 
> the one furtherest to the front, on the manifold side.)
>
> A stud goes in straight up and down until the top of the threads are 
> even with the block, but it wiggles like hell.
> As you tighten the stud down further, the wiggle starts to go away, 
> but the whole thing starts to cant back toward the rear of the block.
> This make it impossible to slide the head down over the canted stud.
>
> To fix this I intend to install a coiled insert.  (drill just 1/32â?? 
> oversized, tap, install insert).
> I am hoping that someone from the list knows of a drilling jig/guide 
> for the drilling phase.
> I know better than to attempt drilling out cast iron without a 
> steadying device of some sort.
>
> Any and all tips and advice are welcome.
>
> The hole is 1 5/16â?? deep, and the threads of the stud measure 3/4â??.
> It is basically threaded top to bottom.
>
> Thanks in advance.
> I hate it when you have to fix the unknown thing to fix the known thing.
>
>
> Kind Regards,
>
> Guy D. Huggins
> guy.huggins@icloud.com
> 817.454.6415
>
>
>
>
>
>
> **triumphs@autox.team.net  **
>
> Donate:http://www.team.net/donate.html
> Archive:http://www.team.net/pipermail/triumphs   http://www.team.net/archive
>
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-- 
Porter Custom Bicycles 2909 Arno St. NE Albuquerque, NM. 505-352-1378 My World 
go here:WWW.PORTERBIKES.COM/

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    <p>... my recollection is waning, but did not the TR7 block have
      purposely canted head studs that had to be removed/inserted
      individually? Anyone?  dp <br>
    </p>
    <div class="moz-cite-prefix">On 12/13/2021 7:08 AM, Randy and
      Valerie DeRuiter wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:SA1PR01MB65434458E9B670E6D451104DB9749@SA1PR01MB6543.prod.exchangelabs.com">
      <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
      <style type="text/css" style="display:none;">P 
{margin-top:0;margin-bottom:0;}</style>
      <div style="font-family: Calibri, Helvetica, sans-serif;
        font-size: 12pt; color: rgb(0, 0, 0);">
        Guy-</div>
      <div style="font-family: Calibri, Helvetica, sans-serif;
        font-size: 12pt; color: rgb(0, 0, 0);">
        <br>
      </div>
      <div style="font-family: Calibri, Helvetica, sans-serif;
        font-size: 12pt; color: rgb(0, 0, 0);">
        I don't want to sound too doom and gloomy, but have you ruled
        out a cracked block at that location?  That is a common spot for
        one, usually from someone in the past who pulled the engine by
        the studs. At least I had an engine like that.  If you haven't
        done so, take a very good look at the inside edge of the
        threaded hole.  If you see a crack, that helicoil trick likely
        won't work.</div>
      <div style="font-family: Calibri, Helvetica, sans-serif;
        font-size: 12pt; color: rgb(0, 0, 0);">
        <br>
      </div>
      <div style="font-family: Calibri, Helvetica, sans-serif;
        font-size: 12pt; color: rgb(0, 0, 0);">
        If you are convinced it is not cracked, possibly another
        solution would be to take advantage of the deeper hole that
        you've measured and get a shop to extend the threads of a longer
        head bolt.  One of the inside longer ones might work - then
        shorten the other end to fit.  The puzzling part is why does the
        stud cant to the rear - that doesn't sound good.</div>
      <div style="font-family: Calibri, Helvetica, sans-serif;
        font-size: 12pt; color: rgb(0, 0, 0);">
        <br>
      </div>
      <div style="font-family: Calibri, Helvetica, sans-serif;
        font-size: 12pt; color: rgb(0, 0, 0);">
        Randy</div>
      <div>
        <div style="font-family:Calibri,Helvetica,sans-serif;
          font-size:12pt; color:rgb(0,0,0)">
          <br>
        </div>
        <hr tabindex="-1" style="display:inline-block; width:98%">
        <div id="divRplyFwdMsg" dir="ltr"><font style="font-size:11pt"
            face="Calibri, sans-serif" color="#000000"><b>From:</b>
            Triumphs <a class="moz-txt-link-rfc2396E" 
href="mailto:triumphs-bounces@autox.team.net";>&lt;triumphs-bounces@autox.team.net&gt;</a>
 on behalf
            of Guy Huggins <a class="moz-txt-link-rfc2396E" 
href="mailto:guy.huggins@icloud.com";>&lt;guy.huggins@icloud.com&gt;</a><br>
            <b>Sent:</b> Saturday, December 11, 2021 5:28 PM<br>
            <b>To:</b> Triumph Mailing List
            <a class="moz-txt-link-rfc2396E" 
href="mailto:triumphs@autox.team.net";>&lt;triumphs@autox.team.net&gt;</a><br>
            <b>Subject:</b> [TR] 1965 TR4A - Looking to drill out a stud
            hole in block. Need recommendations on a drill guide/jig.</font>
          <div> </div>
        </div>
        <div class="" style="word-wrap:break-word;
          line-break:after-white-space">Howdy All,
          <div class=""><br class="">
          </div>
          <div class="">As part the head gasket replacement project, I
            need to address a wallowed-out and stripped cylinder head
            stud hole in the block.</div>
          <div class="">(If you were standing on the manifold side of
            the engine, it would be the one furtherest to the front, on
            the manifold side.)</div>
          <div class=""><br class="">
          </div>
          <div class="">A stud goes in straight up and down until the
            top of the threads are even with the block, but it wiggles
            like hell.</div>
          <div class="">As you tighten the stud down further, the wiggle
            starts to go away, but the whole thing starts to cant back
            toward the rear of the block.</div>
          <div class="">This make it impossible to slide the head down
            over the canted stud.</div>
          <div class=""><br class="">
          </div>
          <div class="">To fix this I intend to install a coiled insert.
             (drill just 1/32â?? oversized, tap, install insert).</div>
          <div class="">I am hoping that someone from the list knows of
            a drilling jig/guide for the drilling phase.</div>
          <div class="">I know better than to attempt drilling out cast
            iron without a steadying device of some sort.</div>
          <div class=""><br class="">
          </div>
          <div class="">Any and all tips and advice are welcome.</div>
          <div class=""><br class="">
          </div>
          <div class="">The hole is 1 5/16â?? deep, and the threads of the
            stud measure 3/4â??.</div>
          <div class="">It is basically threaded top to bottom.</div>
          <div class=""><br class="">
          </div>
          <div class="">Thanks in advance.</div>
          <div class="">I hate it when you have to fix the unknown thing
            to fix the known thing.</div>
          <div class=""><br class="">
          </div>
          <div class=""><br class="">
          </div>
          <div class="">
            <div class="">
              <div class="" style="color:rgb(0,0,0);
                letter-spacing:normal; text-align:start;
                text-indent:0px; text-transform:none;
                white-space:normal; word-spacing:0px;
                word-wrap:break-word; line-break:after-white-space">
                <div class="" style="word-wrap:break-word;
                  line-break:after-white-space">
                  <div style="color:rgb(0,0,0); font-family:Helvetica;
                    font-size:14px; font-style:normal;
                    font-variant-caps:normal; font-weight:normal;
                    letter-spacing:normal; text-align:start;
                    text-indent:0px; text-transform:none;
                    white-space:normal; word-spacing:0px">
                    Kind Regards,<br class="">
                    <br class="">
                    Guy D. Huggins<br class="">
                    <a href="mailto:guy.huggins@icloud.com";
                      class="moz-txt-link-freetext"
                      moz-do-not-send="true">guy.huggins@icloud.com</a><br
                      class="">
                    817.454.6415</div>
                  <div class="" style="color:rgb(0,0,0);
                    font-family:Helvetica; font-size:14px;
                    font-style:normal; font-variant-caps:normal;
                    font-weight:normal; letter-spacing:normal;
                    text-align:start; text-indent:0px;
                    text-transform:none; white-space:normal;
                    word-spacing:0px">
                    <br class="">
                  </div>
                  <br class="x_Apple-interchange-newline">
                </div>
              </div>
              <br class="x_Apple-interchange-newline">
              <br class="x_Apple-interchange-newline">
            </div>
            <br class="">
          </div>
        </div>
      </div>
      <br>
      <fieldset class="moz-mime-attachment-header"></fieldset>
      <pre class="moz-quote-pre" wrap="">** <a class="moz-txt-link-abbreviated" 
href="mailto:triumphs@autox.team.net";>triumphs@autox.team.net</a> **

Archive: <a class="moz-txt-link-freetext" 
href="http://www.team.net/pipermail/triumphs";>http://www.team.net/pipermail/triumphs</a>
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</pre>
    </blockquote>
    <pre class="moz-signature" cols="72">-- 
Porter Custom Bicycles 2909 Arno St. NE Albuquerque, NM. 505-352-1378 My World 
go here: <a class="moz-txt-link-abbreviated" 
href="http://WWW.PORTERBIKES.COM/";>WWW.PORTERBIKES.COM/</a></pre>
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